Engine Coolant Indication System

The engine coolant temperature indication system is a magnetic-type indication system consisting of:
^ The water temperature indicator sender unit located in the engine block or cylinder head.
^ An engine coolant temperature gauge in the instrument cluster.

The water temperature indicator sender unit operates as follows:
^ Changes resistance according to engine coolant temperature, which varies the current flow through the engine coolant temperature gauge.
^ The pointer position varies proportionally to the current flow.
^ resistance is high when the engine coolant temperature is low, and low when the engine coolant temperature is high.
^ The pointer of the magnetic engine coolant temperature gauge remains in position when ignition switch is turned to OFF.
^ Pointer will move to the correct indication whenever the ignition switch is turned back to RUN.
^ Pointer may indicate at the top of the normal band with the engine coolant temperature within specification, under certain driving conditions such as heavy traffic or stop-and-go driving in hot weather.